io.github.Nimistu/nimistu-mcp

Official9 tools

by Nimistu

nimistu — Estonian Business Register

Estonian Business Register: companies, people, beneficial owners, trademarks. Free, no API key.

Estonian Business Register lookups for companies, people, owners, and trademarks.

Topics

business-registerclaudecompany-datacursorestoniallmmcpmodel-context-protocolopen-dataariregister

Captured live from the server via tools/list.

search

Full-text search across the nimistu register of Estonian companies, people and trademarks. Returns matches each with a stable `id` (pass to `fetch`, `get_company` or `get_person`) and a canonical nimistu.ee URL. Use this first to locate an entity by name or registry code.

Parameters (2)

querystringrequired
A company name, person name, 8-digit registry code, or trademark text.
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

fetch

Retrieve the full content of a record by the `id` returned from `search` (e.g. 'company:10000018', 'person:18345', 'trademark:123', 'emtak:47811'). Returns the record text, its canonical nimistu.ee URL and metadata.

Parameters (2)

idstringrequired
Record id from search, formatted '<type>:<value>'.
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

get_company

Full profile of an Estonian company by its registry code: status, address, activity (EMTAK), VAT, employees, financials, tax debt, sanctions, board members, shareholders, beneficial owners, supervisory board, foreign parent, subsidiaries and trademarks.

Parameters (2)

reg_codestringrequired
8-digit Estonian registry code (e.g. '10000018').
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

get_person

Profile of a person in the Estonian business register: birth year, sanctions, and all companies they are connected to (board member, shareholder, beneficial owner, etc.), current and past. Look the person up with `search` first to get their id.

Parameters (3)

idinteger
Internal person id (from a search result, e.g. 18345).
isikukoodstring
Estonian personal identification code (11 digits), if known.
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

lookup_emtak

EMTAK is the Estonian classification of economic activities. Pass `code` for details + stats on one activity, or `query` to search activities by Estonian name. Returns the code, ET/EN name and the count of active companies.

Parameters (3)

codestring
Exact EMTAK code, e.g. '47811'.
querystring
Search activities by Estonian keyword, e.g. 'jaemüük'.
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

companies_by_emtak

List active Estonian companies whose primary activity is a given EMTAK code, optionally filtered by county. Use `lookup_emtak` to find the code first.

Parameters (4)

codestringrequired
Exact EMTAK code, e.g. '47811'.
countystring
Optional county filter, e.g. 'Harju maakond'.
limitinteger
Max companies to return (default 25).
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

whats_new_today

A summary of recent activity: a daily narrative of notable changes plus counts of newly registered companies (last few working days), broken down by legal form, county and activity, with a sample of the newest companies.

Parameters (1)

localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

search_trademarks

Search Estonian-linked trademarks (EUIPO + Estonian Patent Office) by their verbal element. Returns each mark with its status and the owning company.

Parameters (3)

querystringrequired
Trademark text to search for, e.g. 'BOLT'.
limitinteger
Max results (default 10).
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

rankings

Curated leaderboards from the nimistu data: top taxpayers, revenue, profit, employers, tax debtors, grant recipients, procurement winners, people holding the most board seats, audit firms, recipients of state payments, VAT groups, top corporate shareholders, and members of Parliament (Riigikogu) or the Cabinet active in business.

Parameters (4)

liststringrequired
Which leaderboard to return.
limitinteger
How many rows (default 20).
yearinteger
Year for financial lists (taxpayers/revenue/profit/employers). Defaults to the latest available.
localestring
Response language for labels and URLs. 'et' (Estonian, default) or 'en'.

README.md4 KBView on GitHub

nimistu MCP — Estonian Business Register for AI assistants

Connect any MCP-compatible AI assistant (Claude, Cursor, ChatGPT, and more) to the Estonian Business Register (Äriregister) and related open data. Ask about any Estonian company, person, beneficial owner, trademark, or activity sector in plain language — free, no API key, read-only — with every answer traceable to its source.

Powered by nimistu.ee, a free, ad-free public register that aggregates 60+ official Estonian open-data sources, each field carrying its source and last-update date.

Endpoint (Streamable HTTP): https://nimistu.ee/api/mcp
Free — no API key, no signup, read-only
Bilingual — Estonian and English
Traceable — every answer is source- and date-stamped

Quick start

Claude Code

bash

claude mcp add --transport http nimistu https://nimistu.ee/api/mcp

Cursor

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project):

json

{
  "mcpServers": {
    "nimistu": {
      "url": "https://nimistu.ee/api/mcp"
    }
  }
}

Claude Desktop and other clients

json

{
  "mcpServers": {
    "nimistu": {
      "url": "https://nimistu.ee/api/mcp"
    }
  }
}

Stdio-only clients can bridge via mcp-remote:

json

{
  "mcpServers": {
    "nimistu": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://nimistu.ee/api/mcp"]
    }
  }
}

Transports: Streamable HTTP at https://nimistu.ee/api/mcp (recommended) · SSE at https://nimistu.ee/api/sse.

What you can ask

You talk to it in natural language — you don't need to know table names or tool details.

Tell me about an Estonian OÜ — owners, board, financials
Which companies is a given person connected to?
Who are the beneficial owners of a company?
What happened in the Estonian Business Register today?
Top 10 taxpayers and employers in Estonia
Find trademarks containing a word — and who owns them
How many retail companies (EMTAK 47.8) are there, and where?
Compare the 2024 financials of three companies

Capabilities

Nine tools over the full nimistu.ee dataset:

Capability	What it covers
Company profile	status, address, activity (EMTAK), VAT, employees, financials, tax debt, board, owners, beneficial owners, trademarks
Ownership structure	subsidiaries, associates, foreign parent, group structure
Person & connections	a person's current and former ties to Estonian companies (board, shareholder, beneficial owner, representative)
Beneficial owners	the real (natural-person) beneficiaries behind a company
Fresh registry events	what changed in the Estonian Business Register today
Rankings	curated top lists — taxpayers, employers, procurement winners, MPs in business, and more
Trademark search	EUIPO trademarks by text, with their owners
Sector lookup	companies by EMTAK activity code, with counts and locations
EMTAK classification	resolve and explain Estonian activity codes

Data sources and attribution

nimistu aggregates 60+ official sources — Äriregister (RIK), the Estonian Tax and Customs Board (EMTA), EUIPO, public-procurement registers, sanctions lists, and more. Each field shows its source and last-update date.

Sources: https://nimistu.ee/allikad
Usage terms: https://nimistu.ee/litsents
Machine-readable index for agents: https://nimistu.ee/llms.txt

License

The configuration examples and documentation in this repository are released under the MIT License. The nimistu.ee service and the underlying register data have their own terms — see https://nimistu.ee/litsents.

Install

claude_desktop_config.json

{
  "mcpServers": {
    "nimistu-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://nimistu.ee/api/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

Topics

search

fetch

get_company

get_person

lookup_emtak

companies_by_emtak

whats_new_today

search_trademarks

rankings

nimistu MCP — Estonian Business Register for AI assistants

Quick start

Claude Code

Cursor

Claude Desktop and other clients

What you can ask

Capabilities

Data sources and attribution

Links

License

Install